Chapter 1240 Under ignition

Zhang Yang pointed to the place in front of them: "This is the place where the bombing happened that day." Wu Dezhi nodded. The scene had been cleaned up, and no traces of explosion could be seen from the surface.

In terms of describing the scene, Geng Zhichao was obviously more professional. He explained the details of the day to Wu Dezhi and accurately pointed out the location of the vehicle at that time and the scope of the explosion.

Wu Dezhi carefully surveyed the scene and found some clues in places that were not easy to clean.

Geng Zhichao said to Zhang Yang, "He used to be the best bomb disposal expert in Guoan..." After saying that, he paused and said, "It's always been."

Zhang Yang expressed his satisfaction with Geng Zhichao's supplementary explanation. He whispered, "Such an excellent expert has a bad end."

Geng Zhichao sighed, and it was inconvenient for him to comment on the past.

Wu Dezhi returned to them after surveying the scene and said to Geng Zhichao, "Is the wreckage of the vehicle still there?"

Geng Zhichao nodded and said, "Caoqiao parking lot."

Wu Dezhi said, "Let's go and have a look."

The Caoqiao parking lot is not far away. When he came to the parking lot, Wu Dezhi went to check the wreckage of the vehicle alone.

Geng Zhichao took out a cigarette, pulled out one and handed it to Zhang Yang. Zhang Yang waved his hand and said, "No."

Geng Zhichao said, "The murder of Director Xing has attracted great attention from the superiors. A task force was set up as soon as possible and asked us to solve the case within a time limit. At present, we are under great pressure."

Zhang Yang said, "Some people always realize that after something happens, they start to act. What did they do before? With so many things that have happened before, can't you wake them up?

Geng Zhichao sighed and said, "It's just that our opponents are too cunning."

Wu Dezhi checked the wreckage next to the vehicle for half an hour. He did not let go of any details. When he finished all the investigation, he soon came to a conclusion: "Gancheng! It's the usual method of being honest.

Geng Zhichao said, "How can you conclude that it is Guan Cheng?"

Wu Dezhi said, "Gan Cheng likes to use ** explosives, and this kind of car bomb itself is what he is best at. He connects the detonator of the bomb to the car circuit. I have been with him, and I am very familiar with his methods."

Geng Zhichao said, "If I remember correctly, he did it when you were bombed in Dongjiang!"

When Wu Dezhi heard that Geng Zhichao mentioned this matter, he couldn't help frowning. He used his teeth to take off his gloves and whispered, "I've finished what you asked me to do. Can I go now?"

Geng Zhichao said, "Can you tell me some other things about Guan Cheng?"

Wu Dezhi said, "I haven't seen him for a long time. If I can find him, I will stuff a bomb into his crotch with my own hands."

Geng Zhichao said, "Dezhi, can you join our task force?"

Wu Dezhi shook his head and said, "I'm sorry, I won't go back again. I'm disabled and useless to you. It's your own business to arrest people. After saying that, he turned around and left.

Zhang Yang followed his footsteps and got into his car with Wu Dezhi.

After Zhang Yang drove away from the scene, he said, "Why do I feel that you are annoying Geng Zhichao?"

Wu Dezhi smiled indifferently and said, "It's not like it, and of course it's not annoying. I'm not familiar with him in the first place. You don't know the internal situation of the organization. They came to me not only for my help, but also because they doubt me."

Zhang Yang said in surprise, "Doubt you? Why do they doubt you?

Wu Dezhi said, "I'm familiar with their methods of doing things. When Director Xing was killed, the first thing they would lock in was a few people who had worked in the blasting profession in Guo'an. Among them, the business level of me and Guan Cheng was the highest. They would not have thought of Guan Cheng. Let me do it, mainly

Zhang Yang said, "These people are really unnecessary. Why don't you catch Guan Cheng when you have so much time?"

Wu Dezhi said, "You believe me, others may not believe it, and it is normal to investigate. Guan Cheng is very cunning and talented in the explosion, but his style is obvious. He never considers the possible consequences of the explosion and whether it will affect the innocent. As long as he can get rid of the target, he won't care about anything else.

Zhang Yang said, "He should be a madman."

Wu Dezhi nodded and said, "Even a genius will leave clues. The bomb he used to blow up Director Xing was self-made, not a finished product of arms, so it is difficult to trace the source."

Zhang Yang said, "Doesn't that mean it's difficult for us to catch him?"

Wu Dezhi said, "We can't find the source of the bomb, but we can start with the material he made the bomb. He uses this material called triacetone trioxide, or TATP for short, which is synthesized by acetone and hydrogen peroxide at low temperature under the catalyst."

Zhang Daguan doesn't know these professional things. What he cares about is how to find Guan Cheng.

Wu Dezhi said: "The two materials of acetone and hydrogen peroxide are very common and easy to find, but if it is difficult to buy in regular stores, because there will be a record, there are usually two easiest ways to obtain these two materials, one is a school and the other is a hospital. Relatively speaking, the latter is less difficult. We can investigate Guancheng's social network and screen out the people who are related to him and engaged in these two aspects, so that we may find clues from it.

Zhang Yang said, "You didn't say these words to them just now."

Wu Dezhi said, "I don't believe them. There have been so many things going on inside recently, and it's hard to say who is trustworthy. They can doubt me, and I can doubt them as well.

Zhang Yang said, "Let's go, we can only ask the public security system for help in this matter."

Yu Qianghua was a little surprised by Zhang Yang's visit. After hearing his purpose, he verified the truth of the saying that he would go to the Three Treasures Hall. In the matter of Baguamen before, Yu Qianghua always felt that he owed something to Zhang Yang. Yu Qianghua accepted Zhang Yang's request to investigate the social relations.

It has been four years since Guan Cheng left Guoan. Even Yu Qianghua could do nothing about the archives of Guoan during that period, but they still found some clues. Two of Yu Qianghua's relatives were engaged in medical treatment and one was engaged in education. Among them, Guan Cheng's ex-wife Yang Yue'e worked in Xijing And her position is in the pharmacy department.

Zhang Yang and Wu Dezhi learned this, and they immediately locked their doubts on Yang Yue'e. After all, Zhang officials and Wu Dezhi have no right to investigate now. If they want to investigate Yang Yue'e, they must be famous, so Zhang Yang revealed this matter to Yu Qianghua. Yu Qianghua thought about it and decided to I came forward to help them investigate this matter. To be continued.